Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 551

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-551 A Matherville IL RCISILRIWMD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-551 1 Matherville IL HMPNILXDAMD  495J STRATUS NETWORKS 634   2020-10-14   
309-551 2 Matherville IL RCISILRIX3X  224C ONVOY, LLC 634   2021-08-12   
309-551 3 Matherville IL RCISILRIX3X  224C ONVOY, LLC 634   2021-04-05   
309-551 4 Matherville IL RCISILRIX4X  506J TWILIO INTERNATIONAL, INC. 634   2021-08-31   
309-551 5 Matherville IL RCISILRIX3X  224C ONVOY, LLC 634   2020-04-29   
309-551 7 Matherville IL RCISILRIX0X  508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-13   
309-551 8 Matherville IL RCISILRIX3X  224C ONVOY, LLC 634   2023-06-05   
309-551 9 Matherville IL RCISILRIWMD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634   2010-04-15   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.